Date: Thu, 21 Jun 2018 13:54:16 +0200 From: Sven Schwedas <sven.schwedas@....at> To: oss-security@...ts.openwall.com Subject: Re: Intel hyper-threading security issues On 2018-06-21 12:28, Lukas Odzioba wrote: > 2018-06-21 12:22 GMT+02:00 Lukas Odzioba <lukas.odzioba@...il.com>: >> If you feel like you really need that, on Linux you can dump SRAT ACPI >> table decompile it, remove APICID entries of "ht processors", compile >> it back and put into initrd. >> https://www.kernel.org/doc/Documentation/acpi/initrd_table_override.txt > > Or use cpu hotplug mechanism, which should be way more convenient: > https://www.kernel.org/doc/html/v4.17/core-api/cpu_hotplug.html > Hotplug doesn't seem differentiate between HT threads and physical cores, will setting maxcpus=2 on a 2 cores+HT machine reliably disable HT, or can it disable one core and keep HT active on the other? Download attachment "signature.asc" of type "application/pgp-signature" (660 bytes)
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